Failed loading store: says the file doesn't exist when it DOES

My ST2 app has a few screens tied to stores tied to models and filled with JSONP requests. All is well.

I'm now trying to create a listview-style menu for them. I've created the model in /app/model just like all the others, created the store in /store like the others (but manually filled with a data: []), and made a view with a listview like all the others, but when I run the app I get

I'm having a similar peculiar error. Running an app on HoneyComb, ST2, PhoneGap 1.6.1 In the emulator it works fine. When I push it to an actual device (a galaxy Tab 10.1) , I get a bunch of errors as ST2 tries to load my app's views, stores, etc.

Ext.Loader erros in chrome on desktop

Is it right that the offline mode willnot work out of the box for Sencha and you do not plan on supporting it for now.
Could you be more explicit with an example on wha tth ework around is? I am a newbie to sencha and am not grasping the hints you have provided in this thread.